1S-cis-Bifenthrin is a pyrethroid which was evaluated in vitro and the interactions with estrogen receptor were predicted to determine disruption of the hormonal network and the enantioselectivity of bifenthrin in trophoblast. 1S-cis-Bifenthrin was observed to have greater effects of consistent enantioselective interference o hormone signaling. Thus, 1S-cis-Bifenthrin are of significant concern to maternal-fetal health.Third generation synthetic pyrethroid. Insecticide, acaricide. Used in Pesticide detection